Part not showing in Assembly

I have a part that belongs in 5 different assemblies, that refuses to show when opening the assembly and is also hidden in the drawing. When opening the part by itself through the assembly it is fine. It is not hidden, in blank or in a different layer. Sometimes it does show up, like this morning but when I closed the assembly and opened it again it wont show again. Anybody have any suggestions?

Thanks

Check the reference set and see what it is set to.


Check your load options and see what the default reference set is.